52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
// Copyright Jim Bosch & Ankit Daftery 2010-2012.
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// Copyright Stefan Seefeld 2016.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/python/numpy.hpp>
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namespace p = boost::python;
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namespace np = boost::python::numpy;
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np::ndarray zeros(p::tuple shape, np::dtype dt) { return np::zeros(shape, dt);}
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np::ndarray array2(p::object obj, np::dtype dt) { return np::array(obj,dt);}
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np::ndarray array1(p::object obj) { return np::array(obj);}
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np::ndarray empty1(p::tuple shape, np::dtype dt) { return np::empty(shape,dt);}
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np::ndarray c_empty(p::tuple shape, np::dtype dt)
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{
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// convert 'shape' to a C array so we can test the corresponding
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// version of the constructor
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unsigned len = p::len(shape);
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Py_intptr_t *c_shape = new Py_intptr_t[len];
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for (unsigned i = 0; i != len; ++i)
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c_shape[i] = p::extract<Py_intptr_t>(shape[i]);
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np::ndarray result = np::empty(len, c_shape, dt);
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delete [] c_shape;
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return result;
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}
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np::ndarray transpose(np::ndarray arr) { return arr.transpose();}
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np::ndarray squeeze(np::ndarray arr) { return arr.squeeze();}
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np::ndarray reshape(np::ndarray arr,p::tuple tup) { return arr.reshape(tup);}
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Py_intptr_t shape_index(np::ndarray arr,int k) { return arr.shape(k); }
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Py_intptr_t strides_index(np::ndarray arr,int k) { return arr.strides(k); }
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BOOST_PYTHON_MODULE(ndarray_ext)
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{
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np::initialize();
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p::def("zeros", zeros);
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p::def("zeros_matrix", zeros, np::as_matrix<>());
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p::def("array", array2);
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p::def("array", array1);
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p::def("empty", empty1);
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p::def("c_empty", c_empty);
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p::def("transpose", transpose);
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p::def("squeeze", squeeze);
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p::def("reshape", reshape);
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p::def("shape_index", shape_index);
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p::def("strides_index", strides_index);
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}
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